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Transparent rubber shaft seal, thin circular ring with single lip and metal spring

SKF

SKF 13920 Shaft Seal CRW1 NBR 1.375 in ID 2.835 in OD 0.313 in Width

SKU CH-70MH-TCJ54

Rotary shaft seal with 1.375 in ID, 2.835 in OD and .313 in width handles oils, grease and hot water up to 3,480 RPM

  • ColorTransparent
  • Width5/16"
  • Rotary shaft seal rated for 10 psi maximum pressure
  • Nitrile rubber lip resists oil, fuel, grease and hot water
  • Carbon-steel spring maintains lip contact up to 3 480 RPM
  • CRW1 single-lip design with acrylic-coated case
  • 375 in ID × 2.835 in OD × .313 in width fits standard inch housings

SKF 13920 Rotary Shaft Seal

The SKF 13920 is a rotary shaft seal designed for engines and rotating equipment. It suits mechanics and technicians who need a reliable lip seal for shafts measuring 1.375 inches in diameter. The single-lip design uses nitrile rubber for standard fluid compatibility.

Limits of 10 psi and 3 480 RPM

This seal handles a maximum pressure of 10 psi and a top rotational speed of 3 480 RPM. Surface speed must not exceed 6.38 mps. It is rated for animal and vegetable oils, diesel, gasoline, greases, hot water, light heating oil and mineral oils. Higher pressures or speeds will cause premature failure.

Press-fit installation with acrylic-coated case

The acrylic-coated case presses into a 2.835 inch bore without special tools. Ensure the housing is clean and free of burrs before pressing. The carbon-steel spring holds the 0.313 inch wide lip against the shaft. Misalignment or a rough shaft surface often leads to immediate leakage.

Highlights

  • Rotary shaft seal rated for 10 psi maximum pressure
  • Nitrile rubber lip resists oil, fuel, grease and hot water
  • Carbon-steel spring maintains lip contact up to 3 480 RPM
  • CRW1 single-lip design with acrylic-coated case
  • 375 in ID × 2.835 in OD × .313 in width fits standard inch housings

Specifications

BrandSKF
ColorTransparent
Width5/16"

Questions about this item

How do I know the SKF 13920 is the right seal for my shaft and housing?

Match your shaft diameter to the 1.375 in inside diameter and your housing bore to the 2.835 in outside diameter; the 0.313 in overall width must fit the gland depth.

What does the 3,480 RPM limit mean once the seal is installed?

It is the maximum rotational speed the single nitrile lip with carbon-steel spring can sustain without overheating or losing contact at the 6.38 m/s surface speed rating.

How does the 10 psi pressure rating cap what I can seal?

The CRW1 design handles only low-pressure splash or vented cavities up to 10 psi; it is not suited for pressurised hydraulic circuits.

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